Chronic Sinusitis (in Adults)
What Is It?
Chronic sinusitis is a long-term inflammation of the sinuses. The sinuses are moist air spaces behind the bones of the upper face — between the eyes and behind the forehead, nose and cheeks.
Normally, the sinuses drain through small openings into the inside of the nose. Anything that obstructs that flow can cause a buildup of mucus, and sometimes pus, in the sinuses. Drainage from the sinuses can be obstructed by structural abnormalities of the nose, infection, or tissue swelling caused by allergies. The buildup of mucus leads to increased sinus pressure and facial pain.